Description of The North Face Arnuva 50 Boa Trail Running Shoes - Women's The Arnuva 50 Boa is built for the ultra distance runner who runs trails, dirt paths, even road, and offering the innovative Boa® lacing system for a secure, near-custom fit. Features: Last : Endurance Running Approx Weight : [Half-Pair] 10.3 oz (290 g); [Pair] 1 lb 5 oz (580 g) Northotic™ Custom Footbed - The Northotic™ is a multi-density footbed that provides enhanced stability, support and cushioning on the trail. X-2™ Cushioning Technologies - Ideal for the varied uses of the multisport athlete, the added measure of cushioning and protection for the athlete moving fast over rugged terrain. Boa® Lacing System - Unlike traditional lacing systems, the carefully engineered Boa® system enables minute adjustment for optimum closure force each and every time. Technical Rubber Outsole Compounds - Would you buy a one-size-fits-all shoe? TNF didn't think so. So why would you look at footwear that utilizes the same rubber outsole for all activities? NorthFit™ - The mission of NorthFit™ is to scientifically outfit the outdoor athlete with the most precise fit. Proportioned specifically for the female athlete who runs trails, dirt paths, even road, and offering the cutting-edge Boa® lacing system for a rapidly-adjustable, secure fit. Boa® multi-adjust lacing system Abrasion-resistant, bomber synthetic nubuck with highly breathable, protective sandwich-mesh upper TPU injection saddle for medial/lateral midfoot support Northotic™ ergonomically-designed footbed with Poron® forefoot and heel inserts Lightweight, dual-density, compression-molded EVA midsole with X-2™ provides high impact cushioning and long lasting support Semi-curve lasted, with medial-posted rearfoot Thrust Chassis™ and X-Dome™, which provides mechanical assistance to the midsole and support for overpronators Tenacious Grip™ outsole provides excellent on-and-off-road traction, as well as stability and durability under a variety of weather conditions and temperatures UltrATAC" all terrain, all condotion rubber outsole with excellent wet/dry traction for running on road or trail